Another reason I don't make Alistair king is just in case he ends up getting a taste for women. My Warden would not be pleased to discover that he'd got a bunch of lovers on the side.
My Female Human Noble would only be mad if she wasn't invited to be part of the tryst, much how she'd be annoyed if he got it on (again) with Isabela at some point during Silent Grove, since she wouldn't have been included and he hadn't asked her first.
And why do I suspect that Cullen's last name (or first) is simply... Cullen.
Cullen's father: You're a Cullen! Like me, and like my father and his father before him! All the way back to Cullen Cullenson himself!
Cullen: My family aren't particularly imaginative with names...
